compile

Author: iverase

x-pack/plugin/rank-vectors/src/test/java/org/elasticsearch/xpack/rank/vectors/mapper/RankVectorsFieldTypeTests.java

@@ -19,6 +19,7 @@
 
 import java.io.IOException;
 import java.util.Collections;
+import java.util.HexFormat;
 import java.util.List;
 import java.util.Set;